Have your child tell his/her friends that the party will be held on a certain date in the afternoon. But, then call all the parents and tell them of the "real" party.  You will go one morning at 6:00 in the morning and go "kidnap" each party guest. Go to their house, get them out of bed, and put them in the car. The children will come to the party in whatever they were sleeping in.  (Make sure that as you "kidnap" the children, you explain what is going on!) Once you have "kidnapped" all the children, it is fun to go and play games like "Cops and Robbers" to specify the kidnapping theme.  Other games would be fun too. Serve breakfast at the party. Also, when the actual "kidnapping" part is taking place, it is fun to take pictures of the children waking up!